Engraved scientific plate titled Machell's Exhausting Apparatus showing a bulb, tubing, a syringe barrel with gauge, and valve details.

Machell's Exhausting Apparatus, Engraved Plate

An engraved plate showing Machell's exhausting apparatus, with labelled lettered parts. Figure 1 shows a bulb connected by tubing to a cylindrical syringe-like barrel with a pressure gauge, and figure 2 shows small valve and fitting details. The paper is aged and the title is set in capitals across the top.

Artist: Unknown
Date: [1800/1850]
Medium: Engravings
Source: Wellcome Collection
Size: 2561 × 4000 px

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Public domain · Wellcome Collection marks it Public Domain Mark; made by 1850.
Rights checked 2026-11-05 · tier A · as stated by the source: Public Domain Mark (Wellcome Collection)

Credit (appreciated, not required for public-domain works): Wellcome Collection

19th century engraving technical illustration line engraving antique print diagram scientific apparatus medical instruments